Update clang-tools to ab/7423447 am: 986b880a12

Original change: https://android-review.googlesource.com/c/platform/prebuilts/clang-tools/+/1727250

Change-Id: Ie678e7bd702261cebf5a7e4ce38a668f53231a7a
tree: b4dd1d51ec27fa6aab5f6a429e9170e9a43a698e
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml